Posted by PDee [ 206.74.216.237 ] on February 27, 2006 at 19:38:43:

I am making subwoofer boxes for my boat. I am installing Blaupunkt PCW1200 speakers. There will be 2 on the boat.

The box measures 9"x20"x22" for 1.6 ft3 or 45.311l. It has a 2" port. I made the first port 3 3/8" long which according to this site(http://www.bcae1.com/spboxnew2.htm) tuned to 34 Htz.. In testing the port wistled badly below 40 Htz.

Speaker Specs:
I have made another port at 5 1/4" and I think it works better. It is tuned(by software) to 29.5 Htz. I does wistle but not till down at 28 Htz.

Any body know what the disadvantages of tuning lower are??

http://www.blaupunktusa.com/NR/rdonlyres/A836F9A4-C803-41C0-8957-0905208B025C/5710/ProComponentSubwooferSpecs.pdf

Replies:

• Your port's too small in diameter - Duke 09:59:03 02/28/06 (2)
  • Re: Your port's too small in diameter - pdee 12:02:40 03/01/06 (1)
    • A few possiblities - Duke 13:45:34 03/01/06 (0)
• Re: Subwoofer port design question - Wayne Parham 09:53:19 02/28/06 (0)